How do you synthesize polyaniline?
How do you synthesize polyaniline?
Polyaniline (PANI) synthesis. PANI was synthesized by oxidative polymerization using 0.1 M anilinium hydrochloride (ANHC) in 1 M HCl and ammonium peroxydisulfate (APS) as oxidant agent (equimolar to aniline). The polymerization reaction was made in a cooled (0 °C–0.3 °C) and stirred reactor.
What is the structure of polyaniline?
Polyaniline (PANI) is a conducting polymer and organic semiconductor of the semi-flexible rod polymer family. The compound has been of interest since the 1980s because of its electrical conductivity and mechanical properties. Polyaniline is one of the most studied conducting polymers.
How polyaniline acts as a conducting polymer?
Polyaniline can be made conductive by partial oxidation of the fully reduced (leucoemeraldine base) form or by partial protonation of the half oxidized (emeraldine base) form. A major benefit of solubility in the doped form is the ability to spin fibers of the polymer as conductors.
Is polyaniline a conducting polymer?
Polyaniline, a conducting polymer, is prepared by the oxidation of aniline hydrochloride with ammonium peroxodisulfate in aqueous medium. The polymer is obtained in nearly quantitative yield; its conductivity at 20°C is 4.4 Scm−1.
Why is polyacetylene conducting polymers?
The conductivity of these polymers is believed to be a result of the creation of charge-transfer complexes between the polymer and halogen. Charge-transfer occurs from the polymer to the acceptor compound; the polyacetylene chain acts as a cation and the acceptor as an anion.
How are conductive polymers made?
There are two main methods used to synthesize conductive polymers, chemical synthesis and electro (co)polymerization. The chemical synthesis means connecting carbon-carbon bond of monomers by placing the simple monomers under various condition, such as heating, pressing, light exposure and catalyst.
Which is the stable from of polyaniline conducting polymer?
PANi-EB is the most stable among polyaniline. It has been found that doped PANi is remarkably crystalline. It becomes almost amorphous when it is undoped with NH4OH.
